Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/65-20 | 275/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.61 (904.5) | 32.99 (838) | -2.62 (-66.5) -7.4% |
| Width inches (mm) | 12.01 (305) | 10.83 (275) | -1.18 (-30) -9.8% |
| Circum. inches (mm) | 111.87 (2841.57) | 103.65 (2632.65) | -8.23 (-208.92) -7.4% |
| Sidewall Height inches (mm) | 7.81 (198.25) | 6.5 (165) | -1.31 (-33.25) -16.8% |
| Revolutions per mile (km) | 566.36 (351.92) | 611.3 (379.84) | 44.94 (27.93) 7.9% |
275/60-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.53 mph (29.82 km/h) |
| 25 mph (40.23 km/h) | 23.16 mph (37.28 km/h) |
| 30 mph (48.28 km/h) | 27.79 mph (44.73 km/h) |
| 35 mph (56.33 km/h) | 32.43 mph (52.19 km/h) |
| 40 mph (64.37 km/h) | 37.06 mph (59.64 km/h) |
| 45 mph (72.42 km/h) | 41.69 mph (67.1 km/h) |
| 50 mph (80.47 km/h) | 46.32 mph (74.55 km/h) |
| 55 mph (88.51 km/h) | 50.96 mph (82.01 km/h) |
| 60 mph (96.56 km/h) | 55.59 mph (89.46 km/h) |
| 65 mph (104.61 km/h) | 60.22 mph (96.92 km/h) |
| 70 mph (112.65 km/h) | 64.85 mph (104.37 km/h) |
| 75 mph (120.7 km/h) | 69.49 mph (111.83 km/h) |
| 80 mph (128.75 km/h) | 74.12 mph (119.28 km/h) |
| 85 mph (136.79 km/h) | 78.75 mph (126.74 km/h) |
| 90 mph (144.84 km/h) | 83.38 mph (134.19 km/h) |
| 95 mph (152.89 km/h) | 88.02 mph (141.65 km/h) |
| 100 mph (160.93 km/h) | 92.65 mph (149.1 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1556 | 1807 | 1946 | 2032 | 2125 | 2191 | 2264 | 2350 | 2469 | 2588 | 2721 | 2827 | 3019 | 3230 | 3396 | 3502 | 3561 | 3780 | 4084 | 4746 |
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